Harness motion for looms



1927. m 8 W.S1MMCHEN HARNESS MOTION FOR LOOMS Filed Fe b.28, 1925 v Jnvenlor: WM MA-M- ZZ 'nsisiiasiim Patented Mar. 8, 1927.

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WILF-IELM srinvicnnn, or Anssie, ezecaosmvaina, zissieivon 'ro was FIRM: IIPAG INTERNATIONAL PATENT nxrtorrnve con-rant", m n, or AUSSIG, A n. ustt'i N/LAB.), CZECHOSLOVAKIA, A CORPORATION.

HARNESS MOTION FOR LOOMS.

Application filed February 28, 1925; Serial No. 12,363, and in Czechoslovakia March 1, 1924.

This invention relates to a novel heddle frame movement for looms allowing quick and exact replacing of the harness. It is well known in the art that in the present day looms all work connected with the tying upof the harness and straightening of the heddle frames consumes much time. The Maitland-cords are very often getting torn, which necessitates continuous inspection of the shed. In using tension return springs, their selection and exchange must be carefully made to lit the web; besides springs are not sufliciently reliable on account of their variable elasticity.

Thereare certain kinds of heddle gearings, for which instead of strings, straps or wires are employed for pulling the heddle frames, which are positively driven by means of shed-blades and lifting hooks directly secured to the respective heddle-frames.

It is rather difficult however to employ such heddle frame gearings in looms in use at present, for there are but particular looms allowing this combination.

The subject matter of my invention comprises a new string-less heddle frame or shaft movement in looms, easily adaptable to different kinds of looms andcapable of being installed in a ready built loom. The novel device is characterized by great simplicity and 'eXact guiding arrangement, also permitting the employment of either closed heddle-frames or simple shaft-bars.

According to the present invention, the heddle frames or portions of them are reciprocated by a combination of rods and levers, operating perpendicularly guided suspension rods. The movement of the shafts may be taken from a dobby fixed on one side of the upper part of the loom. In general, any of the commonly employed dobbies may be used for this purpose. For the up and down motion of the heddle frames, I prefer oscillating bell cranks in connection with cog-wheel segments engaging in rack bar ends of the suspension rods for the heddle frames. Such bell cranks for producing the shaft-motion are also part of my invention.

The entire driving gear is conveniently arranged above the harness so that it might be easily tended and kept free from lint.

Another object of my invention is a construction of guides for the perpendicular suspension-rods of the heddle frames and their connection with the suspension rods.

In order that the invention may be fully understood. reference will now be had to the accompanying drawing, in which I Fig. 1 shows a front View of the whole gear of the loom.

Figs. 2 and 3 show the guide frames 4 and 5 (Fig. 1) in end view and side elevation respectively.

Fig. 4 shows a plan view of a guide frame, showing in particular the upper group of guide rollers and their spacers- Fig. 5 shows a plan view of the guide rollers in larger scale, with the guidedbars 9 shown in section on the line 5-5 in Fig. 1.

Fig. 6 shows in detail the removable joint between the wooden bars at one end of the heddle frames and the pertaining suspension bars.

Fig. 6 shows a face view of the provided in the suspension bar 9.

Fig. 7 shows in front view a heddle frame with its suspension bars forming part of the frame reciprocating device.

Referring to Fig. 1, the side-frames 1 of the loom are supporting as usual a transsocket.

verse beam 2. The latter serves as a support for the dobby 3 as well as forthe guideframes 4- and 5 for the perpendicular suspension bars 9 of the heddle frames; it serves further to bear the fulcrums of all sets of bell cranks 6 and 7 each set being connected together by a push and pull rod 8. I

Only one set appears in Fig. 1.

All bell cranks are set in the same direc tion, so that the corresponding suspension rods of every pair of levels move up or down unison according to the control exerted by the dobby.

The horizontal arms of the bell cranks carry each a toothed segment 6 engaging a rack bar 6} provided at the upper end of each suspension bar 9, a pair of which bars carries a heddle frame 2 1. These bars 9 are guided in frames at and 5 by means of guide rollers 10. In Figs. 1 and 3 are shown three rollers 10 for each bar, the upper one holding the bar in engagement with its toothed segment 6*. The rollers 10 are mounted on axles 22 extending between the guide frames (Fig. 2) and are separated from each other by small spacers 23 of greater diameter than the rollers, so that the suspension bars are duly spaced andfree to move as shown in detail in Fig. 5.. Thus all bars 9 at one side of the loom are located in a common guide frame, but are individually guided by their own rollers. The guide f ames l and 5 as a whole rest upon sills 11 and 12 n'ovided on, the side frames of the loom. esides frames f and 5 are also attached to the transverse beam 2. For removing the heddle frames from the loom for the purpose of replacement or repairs, all suspension bars 9 on one side of the heddle frames 24: may be withdrawn from the frames by means of a screw 32 threaded into the loom frame and operable by hand wheel 13 which moves in Fig. 1 the guide frame 5 to the right. This is rendered possible by attaching frame 5 to beam 2 in a slot 30 through which the bolt 31 passes. Further, the heddle frames 24 are provided at theends of their horizontal members with studs 25, as shown in detailin Fig. 7 with which they engage rectangular slots provided in bars 9. For saving room in the direction of the width of the loom I prefer omitting the vertical bars 24 of the heddle frames which are shown in Fig. 7, and to correspondingly len then the horizontal bars. For attaching thesebars to suspension bars 9, they are provided with endcaps 26 which carry studs 25 and which latter engage in corresponding slots 27 in the suspension bars 9 as shown in Fig. 6 in detail.

If it should be necessary to only remove one single heddle bar, such a bar (being of wood) may be easily sprung out of the sockets in its suspension bars through its elasticity, without removing the entire side frame by means of hand wheel 13, which latter is employed only when the entire harness is removed. By the term heddle frame, employed in the claims, I wish to include an actual frame, such as illustrated in Fig. 7, as well as horizontal bars only, such as are implied in Fig. 1. The loom driving pulley 14 is fixed to crank shaft 15. A fly wheel 16 is provided at the other end of the crank'shaft. The gearing l7 drives, from shaft 15, the cam shaft 18 on which the beating cams 19 and the driving eccentric 20 or the dobby are mounted. 21 the dobby chain.

shown in'the drawing the position of the driving eccentric 20 is such as to produce an open shed.

While I have shown and described a particular and preferred construct on of my improved' cordless and positively operated heddle frame movement, I wish it to be understood that 1 do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

I claim:

1. In a harness movement for looms for individually operating the heddle frames, having a pair. of bell cranks for each frame one crank on each side of the frame and a push pull rod connection between each pair of bell cranks, a pair of vertically guided suspension bars for each frame connected to the ends of the frame, each bar having a rack at its upper end and a toothed segment at one arm of each bell crank engaging respectively with the rack of its pertaining suspension bar, each heddle frame having suitably shaped bosses at its ends and sockets in said suspension bars adapted to removably engage said bosses.

2. In a harness movement for looms for individually operating the heddle frames, having a pair of bell cranks for each frame and a push-pull rod connection between each pair of bell cranks, a pair of vertically guided suspension bars for each, frame removably connected to the ends of the frame and a positive driving connection between each pair of bars and its pertaining pair of bell cranks, a common guide frame for all suspension bars one each side of the loom, each frame having a number of guide rollers for each bar, spacing disks of larger diameter than the rollers and being disposed between adjacent rollers for spacing adjacent bars from each other, one of said guide frames being movably disposed to permit the simultaneous removal of all its guided suspension bars from their pertaining heddle frame ends.

3. A harness construction for looms CO'mprising lateral guide frames, one on each side 'of the loom, and a beam extending transversely of the loom above the harness for positioning said guide frames, heddle frames disposed between said guide frames, a pair of suspension bars for each heddle fraiiue removably connected to the ends of the heddle frame and individually guided in said guide frames, one of said guide frames be ng movably mounted on said transverse beam for simultanemisly removing all suspension bars from their pertaining heddle frames on one side of the harness to permit the removal of the heddle frames from the harness.

In testimony whereof I affix my signature.

WILHELM s MQ EN. 

